That was the worst set. And from the cylinder 3 if I remember correctly. I had an outer head bolt(ex side) loosen (or not torqued correctly) between cyl 1-2 Not sure if it’s a location thing or bad headgasket issue. But it is last on the food chain via intake manifold runnerWow! Those valves were pretty ugly. Were they all the same or were those the worst, if so what cylinder were they from?